- From: Amir Hameed <amsaalegal@gmail.com>
- Date: Tue, 17 Feb 2026 10:37:31 -0800
- To: Jori Lehtinen <lehtinenjori03@gmail.com>
- Cc: Steffen Schwalm <Steffen.Schwalm@msg.group>, Joe Andrieu <joe@legreq.com>, NIKOLAOS FOTIOY <fotiou@aueb.gr>, Kyle Den Hartog <kyle@pryvit.tech>, Adrian Gropper <agropper@healthurl.com>, Manu Sporny <msporny@digitalbazaar.com>, Filip Kolarik <filip26@gmail.com>, public-credentials <public-credentials@w3.org>
- Message-ID: <CANGYBsx3WWEqrwcQzDFw08g=Afw-72NwTbDbb7GNrJFWp6+OGw@mail.gmail.com>
Steffen, Important points — especially the insistence on separating identifier, identity, and legal recognition. I think we largely agree, but the apparent disagreement sits in the role and necessity of DIDs. 1. "DID is not identity" — Fully Aligned Yes. A DID by itself is: - An identifier - Cryptographically controllable - Semantically neutral No claims, no attributes, no legal meaning. Your distinction holds: - DID alone → Identifier - DID + VC → Contextual / functional identity Identity is constructed via attestations, not embedded in the identifier. 2. VC Does NOT Require a DID — Correct A Verifiable Credential fundamentally needs: - Subject reference - Claims - Issuer signature That subject reference can be anything: - DID - URI - Account number - Certificate DN - Pairwise pseudonym So yes — DID is optional at the VC layer. 3. Then Why Introduce DIDs at All? This is the crucial clarification. DIDs are not introduced because VCs cannot function without them. They are introduced because DIDs solve systemic architectural problems that emerge at scale. 4. Problems When VC Subject is NOT a DID When subject identifiers are: - Provider-issued IDs - Database references - Email addresses - Certificate-bound identities You typically get: - Centralized dependency - Identifier lock-in - Difficult cross-domain portability - Correlation risks controlled by issuers - Complicated key lifecycle management 5. What DIDs Add (Beyond "Just Identifier") A DID provides: *Cryptographic control without central authority* The subject proves control via keys, not registry permission. *Built-in key lifecycle and rotation* Unlike static identifiers: - Keys can rotate - Methods define update and recovery semantics - No need to reissue credentials purely due to key rollover Classic PKI certificates struggle here because: - Certificate expiry does not equal identity expiry - Revocation overhead is significant - Heavy CA dependency creates bottlenecks *Decentralized resolution model* DID → DID Document → Keys and endpoints enables: - Dynamic verification material discovery - No hard coupling to issuer database *Separation of concerns* - DID handles control and authentication layer - VC handles claims and semantics - Trust Framework handles policy and legal meaning *Interoperability across ecosystems* Even with many DID methods, the verification model remains uniform: - Resolve DID - Obtain verification keys - Verify proof Without DIDs, each ecosystem invents: - Custom subject identifier logic - Custom key binding logic - Custom resolution and discovery logic 6. "238 DID Methods Means No Interoperability" Important nuance. Interoperability happens at three layers: Layer Interoperability Status DID Syntax Standardized DID Resolution Method-specific Cryptographic Verification Uniform Yes, resolution differs across methods. But once resolved: - Public keys - Verification relationships - Proof verification all remain method-agnostic. This is similar to how different PKI hierarchies still use the same X.509 verification mathematics. 7. "Why DID if Identity and Transaction Are Separated?" Because DID is not about combining identity and transaction. It is about: - Stable subject reference - User-controlled cryptographic anchor - Decentralized key management - Cross-domain portability Even if: - VC contains only contextual claims - Identity remains minimal - No correlation is desired DIDs still provide: - Pairwise DIDs for relationship-specific identifiers - Disposable DIDs for ephemeral contexts - Context-specific identifiers that limit linkability This actually improves privacy, rather than harming it. 8. Your Primitive Model — Strong Observation You wrote: Identifier Credential Signature Trust Framework Architecturally, this is correct. DID is simply a specialized identifier class optimized for: - Cryptographic control - Decentralized resolution - Key lifecycle management VC is indeed: - Claims container plus signature Registry is: - Trust framework implementation No disagreement here. 9. When DID is Genuinely Optional If a system: - Uses issuer-controlled subject IDs - Has centralized key management - Does not need portability across domains - Does not need subject-controlled rotation Then DID may add unnecessary complexity. This is a perfectly valid design choice. 10. When DID Becomes Valuable If goals include: - User control over identifiers - Ecosystem portability - Reduced central dependency - Flexible key lifecycle management - Pairwise privacy strategies Then DID becomes structurally advantageous. DIDs are not mandatory for verifiable credentials. They are architectural enablers for: - Decentralization - Portability across ecosystems - User control - Long-term key agility The decision is therefore not: *"Do VCs require DIDs?"* but rather: *"What properties do we want our identifier layer to guarantee?"* Best, Amir On Sun, 15 Feb 2026 at 22:04, Amir Hameed <amsaalegal@gmail.com> wrote: > Hi Steve, > > From an implementation perspective, the linkage problem is largely > solvable without introducing new primitives. > > A DID is already a cryptographic construct derived from open, > well-understood mathematics and protocols. Once generated, it can be > registered or referenced within a government or organizational trust > registry. > > Verification then becomes straightforward: > > • During issuance, the authority records a verifiable association with the > DID > > • When interaction is required, ownership is proven via challenge–response > > • The holder demonstrates control of the private key > > • The signed challenge is validated against the registry’s stored > identifier > > In our Sirraya One implementation, the government (or authority) maintains > the authoritative registry reference, while the subject retains control of > the DID and associated VCs/capabilities. > > This preserves: > > ✔ Subject-controlled identifiers > > ✔ Authority-asserted relationships > > ✔ Cryptographic verification of control > > ✔ No dependency on verifier pre-authorization > > Which aligns well with the data-centric trust model you described. > > > Regards, > > > On Mon, 16 Feb 2026 at 11:23 AM, Jori Lehtinen <lehtinenjori03@gmail.com> > wrote: > >> > Perhaps the productive path forward is: >> >> How do we co-evolve: >> >> • Technical architecture >> >> • Governance frameworks >> >> • Legal enforceability >> >> • Usability at population scale >> >> rather than treating sequencing as a blocker? >> >> >> It is exactly that! >> >> The bottleneck is not the technologists here so: presentation formats >> that involve legal text seem absolutely nessecary to get past the >> bottleneck at this point. >> >> Good takes tho Amir! >> >> Regards, >> >> Jori >> >> >> >> ma 16.2.2026 klo 7.44 ap. Amir Hameed <amsaalegal@gmail.com> kirjoitti: >> >>> Hi Jori, >>> >>> I think we’re largely aligned, and I’ve held a similar position >>> throughout. >>> >>> Legal formalization is clearly necessary for legal trust — that’s an >>> invariant in any system interacting with regulation, liability, and >>> institutional acceptance. >>> >>> Where I hesitate is the inverse argument: >>> >>> that a method is “non-viable” simply because it is not yet legally >>> formalized. >>> >>> Legal frameworks evolve. Architectures shouldn’t be dismissed solely >>> because formal recognition trails implementation — especially when those >>> same methods can be formalized once maturity, interoperability, and >>> assurance models stabilize. >>> >>> From a technical standpoint, there seems to be broad consensus: >>> >>> • Cryptographic verifiability >>> >>> • Privacy preservation >>> >>> • Lifecycle & revocation models >>> >>> • Interoperability >>> >>> • Security guarantees >>> >>> The friction appears when non-technical constructs risk being elevated >>> into hard technical requirements. >>> >>> Speaking from experience working in India — an environment with billions >>> of internet users, heterogeneous devices, intermittent connectivity, and >>> real inclusion constraints — identity engineering is less theoretical and >>> far more operational. >>> >>> We’re building and deploying systems under: >>> >>> • Scale pressures >>> >>> • Infrastructure variability >>> >>> • Usability constraints >>> >>> • Security and fraud realities >>> >>> In these “real trenches,” SSI-style models are not abstract ideals; they >>> are practical tools for improving resilience, reducing central points of >>> failure, and enabling privacy-preserving verification. >>> >>> Legal recognition is essential — but so is allowing technical progress >>> to inform what ultimately gets formalized. >>> >>> Perhaps the productive path forward is: >>> >>> How do we co-evolve: >>> >>> • Technical architecture >>> >>> • Governance frameworks >>> >>> • Legal enforceability >>> >>> • Usability at population scale >>> >>> rather than treating sequencing as a blocker? >>> >>> >>> Best regards, >>> >>> Amir Hameed Mir >>> >>> >>> On Mon, 16 Feb 2026 at 11:06 AM, Jori Lehtinen <lehtinenjori03@gmail.com> >>> wrote: >>> >>>> I also agree and have agreed all the time. >>>> >>>> The legal formalization is an obvious requirement for legal trust. >>>> >>>> An invariant! >>>> >>>> It is not helpful to say methods do not work because they are not >>>> legally formalized. >>>> >>>> When they can be legally formalized any time…. >>>> >>>> Everyone already agrees about the technical requirements. >>>> >>>> We have been disagreeng about including parts that include no technical >>>> basis as requirements… >>>> >>>> I will now focus on formalizing what I think will yield the maximal: >>>> >>>> • Deployment speed >>>> >>>> • Governance design >>>> >>>> • Privacy guarantees >>>> >>>> • Recovery & lifecycle management >>>> >>>> • Real-world adoption >>>> >>>> >>>> >>>> ma 16.2.2026 klo 7.21 ap. Steffen Schwalm <Steffen.Schwalm@msg.group> >>>> kirjoitti: >>>> >>>>> "So perhaps the question is not SSI vs government systems, but: >>>>> How do we accelerate implementation while aligning decentralization, >>>>> usability, and regulatory trust? >>>>> >>>>> The meaningful debate is about: >>>>> >>>>> • Deployment speed >>>>> >>>>> • Governance design >>>>> >>>>> • Privacy guarantees >>>>> >>>>> • Recovery & lifecycle management >>>>> >>>>> • Real-world adoption >>>>> >>>>> >>>>> Trust, ultimately, is something we build into the system’s mechanics — >>>>> not something we merely assert." >>>>> >>>>> - Exactly >>>>> >>>>> >>>>> >>>>> ------------------------------ >>>>> *Von:* Amir Hameed <amsaalegal@gmail.com> >>>>> *Gesendet:* Montag, 16. Februar 2026 06:08 >>>>> *Bis:* Steffen Schwalm <Steffen.Schwalm@msg.group> >>>>> *Cc:* Joe Andrieu <joe@legreq.com>; NIKOLAOS FOTIOY <fotiou@aueb.gr>; >>>>> Kyle Den Hartog <kyle@pryvit.tech>; Adrian Gropper < >>>>> agropper@healthurl.com>; Manu Sporny <msporny@digitalbazaar.com>; >>>>> Filip Kolarik <filip26@gmail.com>; public-credentials < >>>>> public-credentials@w3.org> >>>>> >>>>> *Betreff:* Re: Utah State-Endorsed Digital Identity (SEDI) >>>>> legislation >>>>> >>>>> *Caution:* This email originated from outside of the organization. >>>>> Despite an upstream security check of attachments and links by Microsoft >>>>> Defender for Office, a residual risk always remains. Only open attachments >>>>> and links from known and trusted senders. >>>>> >>>>> Hi all, >>>>> >>>>> >>>>> I’m not sure we’re framing the discussion in the most productive way. >>>>> >>>>> >>>>> Self-sovereign identity (SSI) is no longer purely conceptual — >>>>> elements of it already exist in our day-to-day digital interactions. The >>>>> core shift is not simply about what identity model we choose, but about >>>>> user control, privacy, and how trust is established. >>>>> >>>>> >>>>> A web-of-trust perspective reminds us that trust is not something we >>>>> can centrally declare or predefine. It emerges from verifiable >>>>> interactions, cryptographic proofs, and governance frameworks — rather than >>>>> being assumed by default. >>>>> >>>>> >>>>> Decentralized identifiers (DIDs), for example, allow identity to >>>>> function more like a network address anchored in cryptography instead of a >>>>> record anchored solely in an institution. This introduces properties such >>>>> as portability, reduced correlation, and resistance to single points of >>>>> control. These characteristics are not theoretical; they are already being >>>>> implemented and tested in real systems. >>>>> >>>>> >>>>> That said, government-led frameworks like EUDI or SEDI play an >>>>> important role in: >>>>> >>>>> • Legal recognition >>>>> >>>>> • Interoperability at scale >>>>> >>>>> • Liability and assurance models >>>>> >>>>> • Cross-border acceptance >>>>> >>>>> >>>>> So perhaps the question is not SSI vs government systems, but: >>>>> >>>>> >>>>> How do we accelerate implementation while aligning decentralization, >>>>> usability, and regulatory trust? >>>>> >>>>> >>>>> The meaningful debate is about: >>>>> >>>>> • Deployment speed >>>>> >>>>> • Governance design >>>>> >>>>> • Privacy guarantees >>>>> >>>>> • Recovery & lifecycle management >>>>> >>>>> • Real-world adoption >>>>> >>>>> >>>>> Trust, ultimately, is something we build into the system’s mechanics — >>>>> not something we merely assert. >>>>> >>>>> >>>>> Regards, >>>>> >>>>> Amir Hameed Mir >>>>> >>>>> Founder of Sirraya Labs >>>>> >>>>> >>>>> On Mon, 16 Feb 2026 at 10:26 AM, Steffen Schwalm >>>>> <Steffen.Schwalm@msg.group> wrote: >>>>> >>>>> Joe, >>>>> >>>>> >>>>> 1. Trusted issuer registry show somebody is allowed to issue >>>>> something and trustworthy because in the registry >>>>> >>>>> >>>>> - Controls on trusted issuer work in parallel e.g. >>>>> - requirements to inform about security breaches within 24 hours >>>>> Possibility for SB to start investigation or new conformity >>>>> assessment by CAB >>>>> - Conformity assessment based on provable international standards >>>>> - Clear liability for QTSP >>>>> >>>>> >>>>> 2) Means nothing dangerous in arguments of Nikos, it`s pretty much >>>>> similar to root stores from browsers but in hands of trustworthy authorities >>>>> >>>>> 3) there`s no centralized but distributed system as we have > 250 >>>>> QTSP, 31 TL, n CAB >>>>> >>>>> So recommend that we discuss alongside the actual regulation and eiDAS >>>>> technical framework. >>>>> >>>>> Best >>>>> Steffen >>>>> >>>>> >>>>> ------------------------------ >>>>> *Von:* Joe Andrieu <joe@legreq.com> >>>>> *Gesendet:* Montag, 16. Februar 2026 05:45 >>>>> *Bis:* NIKOLAOS FOTIOY <fotiou@aueb.gr> >>>>> *Cc:* Kyle Den Hartog <kyle@pryvit.tech>; Adrian Gropper < >>>>> agropper@healthurl.com>; Manu Sporny <msporny@digitalbazaar.com>; >>>>> Steffen Schwalm <Steffen.Schwalm@msg.group>; Filip Kolarik < >>>>> filip26@gmail.com>; public-credentials <public-credentials@w3.org> >>>>> *Betreff:* Re: Utah State-Endorsed Digital Identity (SEDI) legislation >>>>> >>>>> *Caution:* This email originated from outside of the organization. >>>>> Despite an upstream security check of attachments and links by Microsoft >>>>> Defender for Office, a residual risk always remains. Only open attachments >>>>> and links from known and trusted senders. >>>>> On Sun, Feb 15, 2026 at 1:15 PM NIKOLAOS FOTIOY <fotiou@aueb.gr> >>>>> wrote: >>>>> >>>>> > “[browsers] don't have to "prove their code is secure” before >>>>> engaging with a website during a regulated activity”. >>>>> >>>>> This not true. Browsers have done this implicitly and many web sites >>>>> trust “well-known” browsers. If you try to access a web page with an >>>>> “unknown” or old browser you are denied access. Try for example "curl >>>>> https://www.aa.com/“. >>>>> >>>>> >>>>> This is a wonderful example of how we are talking past each other. In >>>>> a previous email you also suggested *curl >>>>> https://www.us.emb-japan.go.jp/itpr_en/travel_and_visa.htm >>>>> <https://www.us.emb-japan.go.jp/itpr_en/travel_and_visa.htm> * >>>>> >>>>> And, in fact, a simple curl request to that URL fails. Fascinating. >>>>> That surprised me. >>>>> >>>>> However, if you install curl-impersonate, those two URLs open up like >>>>> a jack-in-the-box on the third turn of the crank. >>>>> >>>>> *curl_ff98 https://www.us.emb-japan.go.jp/itpr_en/travel_and_visa.html >>>>> <https://www.us.emb-japan.go.jp/itpr_en/travel_and_visa.html> * >>>>> *curl_ff98 https://www.aa.com <https://www.aa.com>* >>>>> >>>>> So, I acknowledge that you are correct. Apparently, both American >>>>> Airlines and the Japanese Embassy "maintain a list" of approved browsers. A >>>>> useless list, but the filtering is happening. >>>>> >>>>> Unfortunately, they lack a way to prevent impersonating browsers from >>>>> accessing content. >>>>> >>>>> The thing is, you *can* maintain a list of approved browsers, but it's >>>>> not actually going to stop bad actors. At most, it will keep naive actors >>>>> from taking advantage of your system. >>>>> >>>>> Making matters worse, every browser with a developer mode allows >>>>> current users nearly unlimited access to the browser. It's trivially >>>>> hackable. The idea of a secure client is simply unrealistic. >>>>> >>>>> The situation is much like the truism that "Locks don't keep thieves >>>>> out; locks keep honest people honest." The only thing that "approved" lists >>>>> achieve is preventing a bunch of potentially legitimate requests in >>>>> exchange for the false hope that you are preventing malicious activity. You >>>>> aren't actually preventing non-standard browsers from accessing your site. >>>>> You're only preventing non-criminals from accessing your services in their >>>>> preferred way. You think you're making things better, but you're actually >>>>> preventing innovation in the client's processing context. I know. I've been >>>>> fighting the Web's ineffective security-by-obfuscation for decades. >>>>> >>>>> More dangerous is the fact that your advocacy creates a false sense of >>>>> security, literally telling people something is secure when it is not. >>>>> Seriously, your email here is a dangerous recommendation. For anyone >>>>> reading, please DO NOT think that approved browser lists actually prevent >>>>> "unapproved" browser access. >>>>> >>>>> The truism that you can't trust the client is not just a web >>>>> phenomenon or my opinion; it's a deep cybersecurity principle. You might >>>>> want to argue with me, but I suggest you do some research before arguing >>>>> against the combined wisdom of 50+ years of cybersecurity experience. >>>>> >>>>> Seriously, search for "cybersecurity can't trust the client" and >>>>> you'll see a wealth of diverse opinions explaining in various terms why you >>>>> actually can't trust the client in cyberspace. >>>>> >>>>> And what we're seeing in the EUDI is the false belief that you can >>>>> somehow trust "certain" clients, leading to a security architecture that >>>>> centralizes power in the name of security without actually creating a more >>>>> secure system. >>>>> >>>>> You may not agree that the bad things that many of us fear are bad. >>>>> That's fine. Differences in values are fine reasons for differences in >>>>> policy. However, you cannot legitimately assert that depending on secure >>>>> clients is effective security. It isn't. >>>>> >>>>> Since the system is ineffective and many people see real harm in its >>>>> explicit centrality, several of us would love to see the EU shift away from >>>>> this harmful and inevitably insecure approach. >>>>> >>>>> -j >>>>> >>>>> -- >>>>> Joe Andrieu >>>>> President >>>>> joe@legreq.com >>>>> +1(805)705-8651 >>>>> ------------------------------ >>>>> Legendary Requirements >>>>> https://legreq.com >>>>> >>>>> >>>>> >>>>> <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> >>>>> Virus-free.www.avg.com >>>>> <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> >>>>> >>>>>
Received on Tuesday, 17 February 2026 16:36:21 UTC